Short Interest in New Mountain Finance Co. Surges New Mountain Finance Co. experienced a dramatic 143.8% increase in short interest for its 8.250% Notes due 2028 as of mid-February. Short interest now totals 7,800 shares, up significantly from 3,200 shares in late January. With an average daily trading volume of 7,200 shares, the days-to-cover ratio is 1.1 days.1